URL类获取XML

 

1. import java.io.BufferedReader;  
2. import java.io.BufferedWriter;  
3. import java.io.File;  
4. import java.io.FileWriter;  
5. import java.io.InputStream;  
6. import java.io.InputStreamReader;  
7. import java.io.OutputStream;  
8. import java.io.OutputStreamWriter;  
9. import java.net.HttpURLConnection;  
10. import java.net.URL;  
11.   
12. import org.dom4j.Document;  
13. import org.dom4j.DocumentException;  
14. import org.dom4j.DocumentHelper;  
15. import org.dom4j.io.OutputFormat;  
16. import org.dom4j.io.XMLWriter;  
17.   
18. public class GetForeignXML {  
19.     public static void main(String[] args) {  
20.          proccessOper("<getprefixcountresp>   <msgtype>GetPrefixCountResp</msgtype>   <count>5392</count>   <hret>0</hret></getprefixcountresp>");  
21.     }  
22.   
23.     public static String proccessOper(String xmlStr) {  
24.         /**********************发送请求************************/  
25.   
26.         Document doc = null;  
27.         try {  
28.             doc = DocumentHelper.parseText(xmlStr);  
29.         } catch (DocumentException e1) {  
30.             // TODO Auto-generated catch block  
31.             e1.printStackTrace();  
32.         }  
33.   
34.         HttpURLConnection conn = null;  
35.         StringBuffer sb = new StringBuffer();  
36.         try   
37.         {  
38.             URL url = new URL("http://localhost:8082/RequestXML/servlet/ForeignServlet");  
39.             conn = (HttpURLConnection) url.openConnection();  
40.             conn.setDoOutput(true);  
41.             conn.setUseCaches(false);  
42.             conn.setDefaultUseCaches(false);  
43.             conn.setRequestMethod("GET");  
44.             conn.setRequestProperty("Accept", "text/html");  
45.             conn.setRequestProperty("Content-type", "text/html");  
46.             conn.setRequestProperty("connection", "close");  
47.             OutputStream out = conn.getOutputStream();  
48.             BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(out));  
49.   
50.             OutputFormat format = OutputFormat.createPrettyPrint();  
51.             format.setEncoding("GB2312"); //设置XML文档的编码类型  
52.             format.setSuppressDeclaration(false);//设置是否打印文档头，即：<?xml version="1.0" encoding="GB2312"?>  
53.             format.setIndent(true); //设置是否缩进  
54.             format.setIndent("   "); //以空格方式实现缩进  
55.             format.setNewlines(true); //设置是否换行  
56.             format.setTrimText(true);//删除结点值的首尾空格  
57.   
58.             XMLWriter writer = new XMLWriter(bw, format);  
59.             writer.write(doc);  
60.             writer.flush();  
61.             writer.close();  
62.             bw.close();  
63.             out.flush();  
64.             out.close();  
65.             /************************接收返回数据***************************/  
66.             InputStream in = conn.getInputStream();  
67.             BufferedReader br = new BufferedReader(new InputStreamReader(in));  
68.   
69.             char[] mychar = new char[100];  
70.   
71.             int len = 0;  
72.             while ((len = br.read(mychar)) != -1) {  
73.                 sb.append(new String(mychar));  
74.                 mychar = new char[100];  
75.             }  
76.   
77.             br.close();  
78.             in.close();  
79.   
80.             /****将返回的数据写入XML文件****/  
81.             FileWriter fw = new FileWriter(new File("c://MyXML.xml"));  
82.             fw.write(sb.toString().trim());  
83.             fw.flush();  
84.             fw.close();  
85.             System.out.println("$$$$$返回结果长度:" + sb.toString().trim().length());  
86.   
87.         } catch (Exception e) {  
88.             e.printStackTrace();  
89.         }  
90.         return sb.toString().trim();  
91.     }  
92. }